Quick answer

Does the WH-347 need each worker's full Social Security number?

No, and it must not carry one.

Beginning with 1, give each worker an entry number (1A), then last name, first name and middle initial (1B to 1D) and an identifying number (1E), for example the last four digits of the Social Security number. A worker who did two kinds of work in the week appears on two rows with the same entry number.

Watch out: Never the full Social Security number, address, telephone number or email on the payroll you submit; those stay in your own records, where the rule requires them (29 CFR 5.5(a)(3)(ii)(B); (a)(3)(i)(B)).

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This answer is one paragraph of a longer page, which has the context around it and the rest of the form or the week.

Columns 1A to 1E

Sources, pulled on 2026-10-02

Every rule on this page comes from one of these, pulled from the government site on the date shown and written against that text. Open them; they are the authority, not us.

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Does the WH-347 need each worker's full Social Security number? | CertifiedPayrollPro | CertifiedPayrollPro